Checking your wire tension on an electric fence

This is a good time of year to check your high tensile wire tension on your fences.  In late fall the air temperatures are normally at about the mid range point. There will be some expansion and contraction going on with your high tensile wire.

I have noticed, over time, that some of the fences I have built in 100 degree heat of summer will become overly tight in the cold of winter. And, vice/versa, some of the fences I have built in the cold of winter will sag during the heat of summer.  Sometimes this is visually noticeable and sometimes not.

Regardless, this is a good time of year to check your tension and adjust your wire tensioner’s appropriately. There are some high dollar precision tension meters available but none that I know of that can be cost justified for measuring tension on your farm fence.  There is a very simple one that you can build yourself for around $5.  Check it out

Also, some of the tension springs have notches in them that will indicate tension of about 100 pounds per notch. These used periodically can help give you a good feel for the tension.

For 12.5 gauge high tensile wire, I have seen recommendations ranging from 150 pounds up to 250 pounds.  Personally I like around 200 pounds – this will not be overly tight but with very little sag either. I like for my wire to be springy and bouncy.

There have been some isolated incidents, in which, line posts have actually bent due to too much wire tension. And, although, a tight wire at 350 pounds may look nice, it is not necessary and probably causes more problems than a properly tensioned wire.

Here is a link to another blog article that goes into more detail about tensioning high tensile wire:


About Gary Duncan

Gary has been active in the fence business for over 15 years. He also raises Highland cattle in a management intensive grazing system and was the first person to market the PasturePro post back in 2005. He enjoys discussing all things grazing and is the main contributor to the blog.
This entry was posted in Fencing Tips, How-tos, Installation. Bookmark the permalink.

3 Responses to Checking your wire tension on an electric fence

  1. avatar Terry says:

    I have a few of these pasture pro posts and they work great a farmer gave me a few to try but I can’t find a place in BC Canada to buy them does anyone know where I can find a distributer near Vancouver BC Canada

    • avatar Gary Duncan says:

      Hi Terry,
      Our Distributor for the NW United States is:
      Pearson Farm & Fence
      Colfax, Washington
      They ship product into your area on a regular basis. I suggest giving them a call and or any of our On-Line Dealers listed on this website.
      Hope this helps and if I can be of further assistance – just let me know.

  2. avatar Clint Thompson says:

    Hello as well Terry, I have been using Pasture Pro posts for about four years in Williams Lake B.C. that I got from another supplier but they quit handling them so I had been hoarding my last few until a week ago. B.C. now has a dealer and I just received three more pallets of them. I got Lesley at Ferris Fencing to get mine. Clint Thompson.

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